Joint for electrical conduits.



G. W. ABBOTT.

JOINT FOR ELECTRICAL GONDUITS.

APPLICATION FILED APR. 14, 1911,

1,065,492, Patented June 24, 1913.

WITNESSES; IVETR i Attys "1 '0 all gwaom it may concern:

ploy-ed in oints connected with the elbow-member.

UNITED STATES.-

PATENT OFFICE,

QHAUNC w, nson", or AUBURN; aw YORK, assrcmm 'ro NATIONAL METAL MOLD NG OM NY, Q CQBEQBATI E N L A JOINT For. ELECTRICAL coupons.

Application fil d AD Be it known that 'I, CHAUNCEY W. AB- Bo'rr, residingat Auburn, in the county of Cayuga and State of New York, a citizen of the United States, have invented or discovered certain new and useful Improvements in Joints for Electrical Conduits, of which improvements the following isaspecification.

The. invention relates 'particularly' to means for joining together adjacent sections or lengthsot that class of electrical conduits known as metal moldings, and for joining sections of such moldings to junction-boxes.

' and other fittings. Such moldin'gs' are usually made of an inner or base section adapted to abut. against and be secured to a supporting surface such as a wall or ceiling, and a removable cover section. Certain features of the invention may however be embetween conduit sections of other forms.

The object of the invention is to obtain mat and workmanlik'exjoints, which may be ea ily-andsecurely fastened together at the point of installation, and will afford the desired electrical continuity.

In the accompanying drawings, forming part of this specification, Figure 1 is a plain view of an elbow connection, showing the coversection of the elbow-member broken away at one, end, and the open base-section of an adjacent piece of molding-about to be Fig. 2 is a sectional view on the line IIII of Fig. 1. Fig. 3 is a sectional view on the line III-III of Fig. 1; Fig. 4'is a view similar to Fig. 1 showing a junction-box with cover removed, the base-section of a piece of molding, and a connecting-piece,'ready to be assembled; Fig. 5 -is a top plan view of a closure-piece; Fig. 6 is ,a sectional view-on the line VI-YI ofFig. 4, showing the assembled joint; Figs. 7 and 8 are views'in .plan and in side elevation i'espectively of a modified form of connecting-piece; Fig; 9 shows. another embodiment of the invention.

The molding herein shown for pur oses of illu stration is of general elliptical orm,

made up of the inner 0r base-section 1 and the outer or cover-section. 2, formed froin strips of steel, or similar elastic material, so that the cover-section may be snapped Specification of Letters Batent. Patented June 1911. Se ial No. 621,008. 1

In F i elliptica ion-5 an a semi-elliptical COVGF-SOCtlOI]. 6;theends f, the-cover-section 6 being preferabl extended beyond the base-section 5 and adaptedtobe' snapped upon and to clamp the cover-section 2 of seotion5 of the elbow is here shown as re vided with a tongue 7, which is bent 'sli' tly 'out of'the plane of.the;floor of said iasesection, to form a seat for the basesectionf1' t m 1 is'provided with a slot 3 at its end,

screw, or other attaching means, and in the shank of a screw 10.

the screw 10 may first be partly inserted and secured m. the hole Qfthe basesection 1 of mediately below theE-head of the screw then be turned to" V secure the parts firinly together. The coversections may then berapplied as described. .In this way ad'acentsectionsoffinolding ay be has, weetheewith litt e labor or inconvenience, since the necessary screws oc-other securing means may be applied to the workman is not inconvenienced K difficulty of handling thof screws, whic often quite small, and inserting them in proper position while asse mhling the parts. Abroad surface contact is also madebetween the sections thus-effectivelyiprovii ing for the desir the molding-ass. whole.- I

In Figs. 4 and'fi there isillustrated a connection between the molding and a. junc tionbox 11 which may be of'any suitable ingthe, box or themolding with an'integral be used, which is preferably bent, as shown, 'so that one end 13 may reston the floor of the box, whilethebther end14: may act as-a seat for the end of the'base-s'ection 1 of'the molding. The end 13 of the piece 12 is therefore provided with the slot 15 and countersunk-hole 16 to. be engaged by the head of screw 17 partly inserted and held in the hole .18 in the floor of the box; while upon and clamp the side-walls of the base section.

the end 14 is provided with the hole 19 the adjacent piece ofj molding.- The baselending to a countersunk; hole- 8 for 5 a one of the sections before assemblin and fih are

form. In this instance, instead of provid .teiigue, aseparate connecting-piece .12may- 1 the el w 4 is made up of a semicfthe adjacent piece of'molding. 'The sec:

tongue '1 there is formed a hole 9 for the In assembling the parts far described f the adjacent piece; of 'molding'slipped-into place upon the tongue '2. with 'the'hole Sim he screw, and alpositionjo electrical continuityof tion 1 of the moldin for the screw 20, with which engages the beveled slot 21 in the end of,,the base-sec- The box 11 is provided with the open1ng'22 which extends downwardly from the open edge of its wall, and after the connection has been made, and

the cover 2 of the molding snap ed in place, the closure-piece 28 is applied. This 010- sure-piece has an inner flange '23 and opposite slots 24, so that it may engagethe opposite edges of the opening 22 in the wall of the box, and a body portion '25 having curved wings adapted to be snapped upon and to clamp .the end of the cover-section 2'of the 1s the box, and thus protect the insulation on the conductors from inju r In addition to the adzrantages already stated, it may be noted that in the employment of the invention, a close and exact.fitting of abutting conduit members is rendered unnecessary, since in the embodiment shown in Figs. 1, 2 and 3 the joints are cov- "ered by the cover-sectionb, while in the em bodiment shown in Fig. 6 the joints will be' covered by closure-pieces, 28.

' In Fig. 9 there are shown the ends of two adjacent sections of molding, with a plain connecting-piece '29 secured to the wall by a wood-screw 30, and upon the faces of which the molding sections are secured in th manner already described.

1 claim as my invention:

1. In a joint for electrical. conduits, the combination. with a box provided with an opening, and a conduit member secured to the box. adjacent to said opening, of a closure-piece provided with oppositely disposed slotsengaging the opposlte edges of said 0 enlng andwith oppositely'disposed wings c amped upon said conduit member.

2. In a joint for electrical conduits, the

combination with a metal conduit system member provided with athreaded. hole, and a screw having a head and a shankadapted to be partially inserted and held in said hole, of a section of metal conduitprovided at its end with an open-ended slot extendinig longitudinally thereof, said slot being a apted to he slipped around the shank of said screw projectingfrom the hoie and beneath the. head thereof, and said conduit section adapted to be clamped to Sflld 'COIl duit member by the further'movementof said screw.

- In testimony whereof I have hereunto set my hand.

CHAUNCEY w. ABBOTT; 1

Witnesses Y Amen A. TRILL, -MARsHALr. A. Clmls'rr. 

